[Li, Xinwen] Univ Elect Sci & Technol China, Dept Phys Educ, Chengdu 610054, Sichuan, Peoples R China.
[Song, Chao] Army Acad Armored Forces, Dept Weap & Control, Beijing 100072, Peoples R China.
[Rochester, Christine A.] Colorado State Univ, Dept Exercise Sci Phys Educ & Recreat, Pueblo, CO 81001 USA.
[Yan, Chaobing] Hunan Agr Univ, Sch Phys Educ, Changsha 410128, Hunan, Peoples R China.
[Yan, Chaobing] Jiujiang Univ, Sch Phys Educ, Jiujiang 332005, Jiangxi, Peoples R China.